EduNinja

IGCSE Math B10.F Addition ruleTopic Practice

10.F Addition rule

Use of addition rule for two or more mutually exclusive events Knowing that when A and B are mutually exclusive events, P(A or B) = P(A) + P(B)

Question 13(a)

[Maximum number: 1]

A box contains only 8 blue discs, 7 green discs and 5 yellow discs. Discs are to be taken at random from the box and not replaced.

Find the probability that

the first disc taken from the box will be a blue disc or a green disc,

Question 8

[Maximum number: 5]

Table 1 gives information about the probability that a biased red six-sided dice will land on each of the numbers 1,2,5,7,9,11.

Table

Question 8(a)

(a)

Calvin rolls the red dice once.
Calculate the probability that the red dice lands on:

[ 5 ]

Question 8(a)(i)

(i)

either the number 2 or the number 5

[ 1 ]

Question 8(a)(ii)

(ii)

an odd number

[ 1 ]

Question 8(a)(iii)

(iii)

a number less than 8

[ 3 ]
0 selected